Frequencies for first 10,000 rows of cstratm variable in namcs2009 dataset :

  clustered |
psu stratum |
   marker - |
     masked |      Freq.     Percent        Cum.
------------+-----------------------------------
   2.01e+07 |        133        1.33        1.33
   2.01e+07 |        319        3.19        4.52
   2.01e+07 |        128        1.28        5.80
   2.01e+07 |        276        2.76        8.56
   2.02e+07 |        464        4.64       13.20
   2.02e+07 |        227        2.27       15.47
   2.02e+07 |        325        3.25       18.72
   2.02e+07 |        373        3.73       22.45
   2.03e+07 |        519        5.19       27.64
   2.03e+07 |        161        1.61       29.25
   2.03e+07 |        194        1.94       31.19
   2.03e+07 |        302        3.02       34.21
   2.04e+07 |        556        5.56       39.77
   2.04e+07 |        210        2.10       41.87
   2.04e+07 |        164        1.64       43.51
   2.04e+07 |          6        0.06       43.57
   4.01e+07 |        900        9.00       52.57
   4.02e+07 |      1,872       18.72       71.29
   4.03e+07 |      2,141       21.41       92.70
   4.04e+07 |        730        7.30      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016